---
title: "Pagham Lagoon Water Quality Investigations"
ocid: "ocds-h6vhtk-06026e"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-06026e"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-06026e.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-06026e.json"
source: "Find A Tender Service"
current_stage: "Award"
buyer: "NATURAL ENGLAND"
published: "2026-02-11"
---

# Pagham Lagoon Water Quality Investigations

Buyer: NATURAL ENGLAND  
Current stage: Award  
OCID: ocds-h6vhtk-06026e

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## Summary

The procurement process titled "Pagham Lagoon Water Quality Investigations" was initiated by Natural England, a public authority within the central government, located at the Seacole Building, 2 Marsham Street, London. This process falls under the industry category of "Marine survey services." The tender aimed to address poor water quality at Pagham Lagoon, with the procurement method being an open competition below the threshold. The timeline included key activities such as a tender period ending on 26th January 2026, and the investigation completed by 31st March 2026. The contract was awarded to CARCINUS LTD, marking the procurement stage as complete, with a contract period from 2nd February to 31st March 2026.

This tender provides significant opportunities for companies specializing in environmental analysis and marine survey services. It is an excellent chance for SMEs like CARCINUS LTD to expand their portfolios by undertaking detailed water quality assessments that can influence long-term ecological interventions. Businesses equipped to perform comprehensive analyses of water pollutants and capable of providing actionable insights would find this project beneficial for growth. By successfully executing such contracts, companies can bolster their reputation in delivering complex environmental services, setting a strong precedent for future opportunities in the ecological and environmental sector.

## Notice

Pagham Lagoon (Unit 1 of Pagham Harbour SSSI) has been reported as having poor water quality by an external stakeholder, who provided water quality data showing significantly elevated levels of E. coli, total coliforms, and Enterococci. While these parameters are not typically assessed by Natural England, the concentrations reported are of potential ecological concern. No other water quality data for the lagoon is currently available. Following further desk-based investigation, the source of the pollutants is still unknown. Natural England are therefore seeking to obtain a baseline understanding of the water quality condition at Pagham Lagoon and identify the sources of pollutants. This will allow Natural England to determine the best course of action to address the water quality issues within Pagham Lagoon. We will then use this baseline knowledge to implement targeted interventions to ensure SSSI condition improvement. The requirements for the investigation are: 1. Desk based review of known/mapped outfalls into the lagoon, and any other existing evidence. 2. Mapping of surface water drainage system that feeds into the lagoon, to identify key potential sources. 3. Testing of the water quality within the lagoon is expected to include a broad range of parameters to establish baseline conditions and identify potential sources of pollution. The following parameters should be assessed as a minimum: * Dissolved Oxygen * Biochemical Oxygen Demand (BOD) * Turbidity * Nitrogen (likely Dissolved Inorganic Nitrogen due to the saline nature) * Phosphorus (preferably soluble reactive phosphorous) * Ammonia * Conductivity * Temperature * Sulphate * Soluble reactive phosphorous Additional parameters of concern will include: * E. coli * Enterococci * Consideration will also be given to possible sediment sampling, subject to confirmation of lagoon connectivity and sediment deposition processes. * Sampling will be undertaken under various weather conditions to determine whether water quality fluctuations are linked to storm events. * Final written report compiling findings from the desk based and on the ground investigation, identifying and distinguishing sources of pollution, and recommendations for actions to improve water quality review of the information suppliers would need to decide whether they would be interested in an opportunity. This is to be completed by 31st March 2026

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/012340-2026 |
| Notice type | UK7 - Contract Details Notice |
| Procurement type | Standard |
| Procurement category | Services |
| Procurement method | Open |
| Procurement method details | Below threshold - open competition |
| Tender suitability | SME |
| Awardee scale | SME |
| All stages | Tender, Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 11 Feb 2026 |
| Submission deadline | 26 Jan 2026 |
| Future notice date | Not specified |
| Award date | 28 Jan 2026 |
| Contract period | 2 Feb 2026 - 31 Mar 2026 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | £8,333 |
| Lots value | £8,333 |
| Awards value | Not specified |
| Contracts value | £8,250 |

## Status

| Field | Value |
| --- | --- |
| Tender status | Complete |
| Lots status | Complete |
| Awards status | Active |
| Contracts status | Active |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | NATURAL ENGLAND |
| Locality | LONDON |
| Post town | South West London |
| Postcode | SW1P 4DF |
| Country | England |
| ITL 1 | TLI London |
| ITL 2 | TLI3 Inner London - West |
| ITL 3 | TLI35 Westminster and City of London |
| Local authority | Westminster |
| Electoral ward | St James's |
| Westminster constituency | Cities of London and Westminster |
| Delivery location | TLJ South East (England) |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 1 |
| Supplier names | CARCINUS |

## CPV Codes

### Divisions

- 71 - Architectural, construction, engineering and inspection services

### Codes

- 71354500 - Marine survey services

## Release History

- 11 Feb 2026 at 12:05 - Award - UK7 - Contract Details Notice - https://www.find-tender.service.gov.uk/Notice/012340-2026
- 16 Jan 2026 at 10:09 - TenderUpdate - UK4 - Tender Notice - https://www.find-tender.service.gov.uk/Notice/003752-2026
- 9 Jan 2026 at 09:57 - Tender - UK4 - Tender Notice - https://www.find-tender.service.gov.uk/Notice/001703-2026

## Documents

- https://www.find-tender.service.gov.uk/Notice/012340-2026
  11th February 2026 - Contract details notice on Find a Tender
- https://www.find-tender.service.gov.uk/Notice/003752-2026
  16th January 2026 - Tender notice on Find a Tender
- https://www.find-tender.service.gov.uk/Notice/001703-2026
  9th January 2026 - Tender notice on Find a Tender
- https://www.find-tender.service.gov.uk/Notice/Attachment/A-10037
  Request for Quotation
- https://www.find-tender.service.gov.uk/Notice/Attachment/A-10039
  Order Form
- https://www.find-tender.service.gov.uk/Notice/Attachment/A-10041
  Commercial Response Template
- https://www.find-tender.service.gov.uk/Notice/Attachment/A-10403
  Clarifications to bidders questions

## Notice URLs

- https://www.carcinus.co.uk
- https://www.legislation.gov.uk/ukpga/2023/54/contents

## Provenance

This Markdown file is an alternate public rendering of the D3 Tenders contract record. The canonical page is https://d3tenders.com/contract/?ocid=ocds-h6vhtk-06026e. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-06026e.json.